SEAGATE TECHNOLOGY, INC. Customer Technical Support FAX Network +1 408 438-8137 Customer Technical Support Bulletin Boards (300-9600, 8-N-1) /----------------------------------+---------------------------------\ | United States +1 408 438-8771 | United Kingdom +44 628 478011 | +----------------------------------+---------------------------------| | Germany +49 89 140-9331 | Singapore +65 227-2217 | \----------------------------------+---------------------------------/ (C)opyright 1991 ST-225N SCSI 5 G G 12 /SCSI Cable /-4-3-2-1-\ o o o o /...|.....................\ | O O O O | Power o o o o ......................... \---------/ ======================================================== 1 2 4 P \----1 \----1 \----1 Terminating Resistors --+-- \- Parity Check enable \----- ID Selects, ID 0 (none) for single drive system ST - 225N UNFORMATTED CAPACITY (MB) ________________25 FORMATTED CAPACITY (17 SECTORS) (MB) _____21.3 ACTUATOR TYPE ____________________________STEPPER TRACKS ___________________________________2,460 CYLINDERS ________________________________615 HEADS ____________________________________4 DISCS ____________________________________2 MEDIA TYPE _______________________________OXIDE RECORDING METHOD _________________________MFM TRANSFER RATE (mbits/sec) ________________5.0 SPINDLE SPEED (RPM) ______________________3,600 INTERFACE ________________________________SCSI TPI (TRACKS PER INCH) ____________________588 BPI (BITS PER INCH) ______________________9,827 AVERAGE ACCESS (ms) ______________________65 SINGLE TRACK SEEK (ms) ___________________20 MTBF (power-on hours) ____________________100,000 POWER REQUIREMENTS: +12V START-UP (amps) _2.4 +12V TYPICAL (amps) __0.9 +5V TYPICAL (amps) ___1.2 TYPICAL (watts) ______16.8 MAXIMUM (watts) ______35 BUFFERED STEP PULSE RATE (micro sec) _____5-200 WRITE PRECOMP (cyl) ______________________N/A (616) REDUCED WRITE CURRENT (cyl) ______________N/A (616) LANDING ZONE (cyl)________________________670 IBM AT DRIVE TYPE ________________________0 or NONE Seagate reserves the right to change, without notice, product offerings or specifications. (6/26/90)